PHP array length

To get PHP array length use following:

    $arr = array(1, 2, 3);     
    echo count($arr); // will output 3

If you need to check if non-associative array is enough long, use:

    if (isset($arr[5])) {
    }

instead of:

    if (count($arr) >= 6) {
    }

Note that array indexing begins with 0.
First approach is much faster, as it only checks existence of 6th element.